Swinging drum for hoisting engines



A. J. IMHOFF.

- SWINGING DRUM FOR HOISTING ENGINES.

APPUCATlON man AUG.H, 1921,

1,419,855. Patented June 13 1922.

UNETE fiTATES PATENT @EFIQE.

AUGUST J. IMHOFF, 0F NEWARK, NEW JERSEY, ASSIGNOR TO J. S. MUNDY HOISTING- ENGINE 00., A CORPORATION OF NEW JERSEY.

SWINGING DRUM FOR I-IOISTING ENGINES.

Specification of Letters Patent. Patented J 13 1922 Application filed August 11, 1921. Serial No. 491,426.

T 0 all whom it may concern.

Be it ,known that I, AUGUST JOHN Inn.

HOFF, of the city of Newark, county of Essex, State of New Jersey, and a c1t1zen of the UnitedStates, have invented certain new and useful Improvements 1n Swinging Drums for Hoisting Engines, of which the following is a specification.

This invention relates, generally, to hoisting engines, and the object is to provide an improved form of drum particularly intended for use in controlling the mast of a der rick, the mast-turning rope. being secured.

to the drum and being connected with the mast. However, the drum of my invention is obviously applicable to a wide range or field'of uses, and is not by any means confined in its application to hoisting-engines.

The object is, more specifically, to improve the form of mast-turning drum disclosed in United States Letters-Patent No. 772,639,,

granted October 18, 1904-, to James N. Wright, assignor to Joseph S. Mundy, for improvements in hoisting engines.

The purpose of the present improvements is to provide a drum peculiarly formed to permit of taking up slack in the mastturning rope, and to provide such drum, in two sections, with novel means for adjusting sald sections toward and away from each other, to take up wear in the frictional coneclutches engageable with said drum.

The invention, in its preferred form, is clearly exemplified in the accompanying drawing, in which like reference characters indicate corresponding parts throughout the several views. Briefly described:

Figure 1 is a longitudinal, diametricsectional view through a drum constructed in accordance with my invention;

Figure 2 is a view in end elevation, looking at the right-hand end of Fig. 1; and

Figure 3 is a detached, detail view, in side elevation, partly broken away and partly in section, of one of the sleeve. or couplingmember sections.

Referring, now, in detail to thedrawing:

As shown, the drum is in two sections 1 and 2, each provided with an axial bore 3 for the reception of a shaft onwhich the drum is loosely and slidably mounted, as disclosed in said patent.

Each of said drum-sections is provided with a lateral, circumferential flange 3,

hollowed out on its outer side or face, and

having the circumferential wall of its chamber reversely conical, as shown at 4, thus forming a clutch face for engagement with a friction cone, as shown and described in said patent.

The two drum-sections are axially alined and of the same diameter, and are pro vided, at adjacent ends, with exterior right and left hand threads 5; for instance, the threads on the section 1 may be left hand threads, and those on the section 2 right hand threads, or vice versa.

Uniting the drum-sections, at adjacent ends, is a coupling member or screw-collar, in two sections, 6, 6, screwed on the threaded ends of said drum-sections,one of said collar-sections 6 on each drum-section. Each 8 of said collar-sections 6 is provided, laterally, with a circumferential flange 6, provided, near its outer or free edge, with an annular series of equidistantly-spaced boltholes 7. In assembled position, the collarflanges 6 are adapted to abut, face to face, and two or more bolts (two being shown in the drawing), 8, 8, are adapted to be passed through alined apertures 7 in said flanges, and nuts 9, 9 on the/threaded ends of said bolts normally secure the bolts in position and the collar-sections 6, 6 against relative movement. 7

Each of said collar-flanges 6 is provided, peripherally, with equidistantly-spaced notches 6.

Each of said collar-sections 6, 6 is provided with one or more bosses (one being shownin the drawing), 6", drilled to pro vide a threaded hole 6 therethrough, in which a screw 6 may be threaded to bear against the corresponding drum-section 1 or 2, and thus frictionally hold said c0llarsections 6, 6 and said drum-sections 1 and 2 against relative movement.

The drum-section 2 is provided, peripherally, with radially-extending recesses 2, preferably three in number.

Means are provided to prevent independence of rotation of said drum-sections 1 and by the reference-numerals 11, 11. As shown, each pin is of a length somewhat less than the combined length of the two registering recesses 10, 10, in which it is seated, but greater than the length of a single opening 10.

that, when they are moved to the limit of their travel to the left in Fig.1, from the position in which they are shown in said figure, they will be free of the openings in the drum-section 2.

The drum-section 1 is cut away longitudinally and peripherally, as shown at 12, 12, so as to provide two slots or openings communicating with the two recesses 10, 10,

in said drum-section, said cut-away portions extending from a point in proximity with one end of said two recesses and terminating short of the adjacent end of said drumsection 1.

A plug or cap 18 for each of said cutaway portions 12 is provided, each of said plugs normally resting upon the corresponding pin. 11, thereby limiting inward move ment of said plug in the recess 10. i A screw 14 passing transversely through each of said caps or plugs and seated at its inner end in said drum-section 1 holds the plug in position. The heads of the screws are countersunk in the drum-section 1, as shown.

A screw 15 is adapted to pass transversely through each of the pins 11, its head nor mally being seated in one end of the cutaway portion 12.

Preferably, the screws 6 bear against the drum-sections 1 and 2 through an interposed plug 6 (one for each screw), as shown in Fig. 3.

In operation, to take up slack in the mastturning rope: Tiev bolts 8, 8 are removed; the screw-studs 14, 14: are unscrewed, and the plugs 13, 13 removed from the angular extensions 12, 12 of the recesses 10, 10; the screw-studs 15, 15 are unscrewed about three fourths of an inch, so that the outer ends thereof project beyond the periphery of the drum, whereupon, using these projecting ends as finger-holds, the operator slides the pins 11, 11 to the left in Fig. 1, so that they clear the openings or recesses 10 in the drumsection 2, which drum-section can now be turned. The operator thereupon places a steel bar in one of the holes 2 in saiddrumsection 2, and turns said drum-section until, say, the two openings 10 next succeeding the two openings in said drum-section in which the bolts 11,11 had just been withdrawn are in register with the two recesses 10, 10 in the drum-section 1; whereupon the bolts 11, 11 are movedinto said two registering recesses 10,10 in the'drum-section 2, the studs 15, 115 are screwed in until their outer ends are flush with the drum-periphery, the plugs 13,13 are replaced, the plug-screws 14,14

The length of the pins relative to the" alined. recesses in which they slide is such screwed into operative position, and the bolts 8, 8 replaced. i

The operation of spreading thedrum-sections apart, to take up wear in the wood friction-cones engaging the cone-surfaces t, 4:, is as follows: The set-screws 6 6 are loosened; then a baris placed in'one' of the slots 6 and the operator, standing at the front of the engine, turns the collar 66 towards himself until the desired adjustment is attained, whereupon the set-screws 6 6 are tightened and the bar removed from the slot 6*.

The advantages of my invention will be obvious, especially to those skilled in the art to which it pertains. Changes may be made in the physical embodiment shown, within the scope of the appended claims, without departing from the spirit of my invention, or necessarily sacrificing any of its advantages.

Having thus fully described my invention, what I claim as new and desire to secure by Letters-Patent is:

1. A drum in two aXially-alined sections, the adjacent ends thereof having longitudinally-extending recesses, an annular seriesthereof being provided in one drum-section and two of such recesses in the other drumsection, said two recesses'having, each, at its inner end, an offset, angular portion extending through the periphery of said drumsection, and said two recesses being adapted to register with two of the recesses in said annular series, two bolts slidably mounted in the two pairs of registering recesses, a plug removably seated in each of said angular, offset portions of said two recesses and bearing against said bolts for normally holding them against longitudinal movement, and means for normally holding said drum-sections against relative longitudinal movement.

2. A drum in two ELXlttllY-EtllllGCl866 610118, the adjacent ends thereof having longitudinally-extending recesses, an annular series,

thereof being provided in one drum-section and two of such recesses in the other drumsection, said two recesses having, each, at its inner end, an offset, angular portion extending through the periphery of said drumsection, and said two recesses being adapted to register with two of the recesses in said annular series, two bolts slidably mounted in the two pairs of registering recesses, a plug removably seated in each of said angular, offset portions of said two recesses and bearing against said bolts for normally holding them against longitudinal movement, screws passing through said plugs for removably holding them againstidisplacement, and means for normallyholding said drumsections against relativelongitudinal move-.

the adjacent ends thereof having longitudinally-extending recesses, an annular series thereof being provided in one drum-section and two of such recesses in the other drumsection, said two recesses being adapted to register with two recesses in said annular series, two bolts slidably mounted in the two pairs of registering recesses, members carried by said bolts and projecting therefrom and adapted to be used by the operator in sliding said bolts, means for normally holding said drum-sections against relative longitudinal movement, and means for normally holding said bolts against longitudinal movement.

4. A drum in two aXially-alined sections, the adjacent ends thereof having longitudinally-extending recesses, an annular series thereof being provided in one drum-section and two of such recesses in the other drumsection, said two recesses being adapted to register with two recesses in said annular series, two bolts slidably mounted in the two pairs of registering recesses, threaded studs screwed into said bolts and adapted to be used by the operator in sliding said bolts, means for normally holding said drum-sections against relative longitudinal movement, and means for normally holding said bolts against longitudinal displacement.

5. In hoisting-apparatus, the combination of a hoisting drum in two aXially-alined sections exteriorly threaded at adjacent ends, the threads on' one of said ends being righthand threads and those on the other end being left-hand threads, and means for effecting, independently, either an adjustment of said drunrsections axially toward and away from each other, or a rotatable adjustment of one of said drum-sections with reference to the other drumsection, and comprisin a screw-collar in two sections, one of w ich is screwed on one of said threaded ends, and the other of which is screwed on the other threaded end, and means for normally holding said screwcollar sections against relative rotation.

6. In hoisting-apparatus, the combination of a hoisting drum in two axially-alined sections exteriorly threaded at adjacent ends, the threads on one of said ends being righthand threads and those on the other end being left-hand threads, and means for effecting, independently, either an adjustment of said drum-sections axially toward and away from each other, or a rotatable adjustment of one of said drum-sections with reference to the other drum-section, and comprising a screw-collar in two sections, one of which is screwed on one of said threaded ends, and the other of which is screwed on the other threaded end, and bolts connecting said screw-collar sections.

7. In hoisting-apparatus, the combination of a hoisting drum in two axially-alined sections exteriorly threaded at adjacent ends, the threads on one of said ends being righthand threads and those on the other end being left-hand threads, and means for effecting, independently, either an adjustment of said drum-sections axially toward and away from each other, or a rotatable adjustment of one of said drum-sections with reference to the other drum-section, and comprising a screw-collar in two flanged sections, one of which collar-sections is screwed on one of said threaded ends, and the other of which collar-sections is screwed on the other threaded end, and bolts passing through the flanges of said collar-sections.

8. In hoisting-apparatus, the combination of a hoisting drum in two aXiaIly-alined sections exteriorly threaded at adjacent ends, the threads on one of said ends being righthand threads and those on the other end being left-hand threads, and means for effecting, independently, either an adjustment of said drum-sections axially toward and away from each other, or a rotatable adjustment of one of said drum-sections with reference to the other drum-section, and comprising a screw-collar in two flanged sections, one of said collar sections belng screwed on one of said threaded ends, and the other collar section being screwed on the other threaded end, the flanges of said collarsections being provided with marginal notches, and means for normally holding said screwcollar sections against relative rotation.

In testimony whereof I hereunto affix my signature.

AUGUST J. IMHOFF. 

